Paper TF-TuP17
Novel Fabrication of Flexible Graphene-basedChemical Sensors with Heaters using SoftLithographic Patterning Method
Tuesday, December 9, 2014, 4:00 pm, Room Mauka
We have fabricated graphene-based chemical sensors with flexible heaters for the highly-sensitive detection of specific gases. We believe that increasing the temperature of the graphene surface significantly enhanced the electrical signal change of the graphene-based channel, and reduced the recovery time needed to obtain a normal state of equilibrium. In addition, a simple and efficient soft lithographic patterning process was developed via surface energy modification for advanced, graphene-based flexible devices, such as gas sensors. As a proof of concept, we demonstrated the high sensitivity of NO2 gas sensors based on graphene nanosheets. These devices were fabricated using a simple soft-lithographic patterning method, where flexible graphene heaters adjacent to the channel of sensing graphene were utilized to control graphene temperature.